Vulcanizing apparatus.



B. P. & P. I. REMY.

VULGANIZING APPARATUS. AP1LIOATION TILED APR.-29, 1909.

Patented Oct. 3,- 1911.

m. 7 r v r iii? w M a Q 4 5 m. WWW H We e .N ma m M 1. 1 A

WITNESSES I UNITED STATES PATENT ormon.

' iBENJAlVIIN 1. REMY AND FRANK I. REMY, OF ANDERSON, INDIANA, ASSIGNORS TO THE REMY ELECTRIC COMPANY, OF ANDERSON, INDIANA, ACORPORATION.

,VULCANIZING APPARATUS.

Specification of Letters ratent.

Patented Oct. 3, 191-1.

Application filell April 29, 1909. Serial No. 492,853.

To all whom it may concern:

Be it known that we, BENJAMIN P. REMY and FRANK I. REMY, of. Anderson, county of I Madison, and State of-Indi-ana, have iniber will limit such contraction, and thus prevent bubbling and malformation or weakening of the rubber after it is vulcanized.

To that end the molds are so arranged with reference to each other that nothing will limit the contracting movement thereof excepting the rubber.

When the .molds are formed of two memberS,; as shown herein,

.one is preferably-provided with. a recess and the other with a piston-like projection fitting and operating in said recess soas to compress the rubber and not permit any of r it to escape during the vulcanization. The

quantity of the rubberplztced in'the mold is since none can escape,

predetermined an an article of exactweight and size can be produced. The side flanges of the-mold. are

.so; formed with Felation'to each other that tlrby will not touch as lung-as there is. any rubber in the mold, so that the. sides never come in contact during vulcanization, and there is no limit to the contracting move- -ment of the mold members excepting the rubber, and it is this feature which is of particular value iuthe formation of homogeneous, hard rubber articles with a smooth connection with or held in the mold members.

I The nature of the'invention will be under- 'tifitic'al. section through aset of yulcanizing hard surface, free from blisters, bubbles or other malformation. Likewise, the feature,

of the invention just explained enables metal articles, or the like, to be securely and ac.-

curately embedded and located inthe hard rubber. To that end ,the said metal-object to be embedded inthe rubber is mounted in some mannerby stood from the accompanying drawings and the following description and claimsi In the drawings Figure'lis a central vermolds, whereby a half dozen hard rubber arholes are simultaneously formed. Fig. 2 is a central section through one mold and the compressing means, and showing the mold members in position after the rubber has been placed therein and before vulcanization thereof.- Fig. 3 is a plan view of Fig. 1.

Each mold consists of a lower member 10 and an upper member 11. As herein shown,

they are disk-like and their adjacent surfaces are suitably formed to give the desired shape to the hard rubber articles 12 after their vulcanization. The lower member 10 ofeach mold has a recess in itsupper surface to receive the rubber 12 thatis .to be vulcanized There is a central annular downwardly extending portion from the upper member of the mold that projects and operates piston-like in said recess in the lower mold member for thepurpose of compressing the rubber therein. The central ber of the mold preferably fits snugly in the recess so as to prevent the escape of rubber while soft during vulcanization,an d also said extension is of such length thatithe side ortions of the mold members willinotcome in contact with each other during vulcanization or as long as there is any rubber in the mold, but only thecompressed and con-- tracting rubber will resist and limitv the contracting movement of the mold members.

Metal objects, such asa in 13, are em-- bedded in the rubber by beingmounted'in connection with the'mold members. Thus as shown, the lower mold member is provided with a recess in which the pin 13'is mounted and held. The upper member is provided. with a hole 18in which the upper end of the pin 13 projects and by which it is guided during the contracting movement of the mold members. 'Since the rubber duringvulcanization in mold members arranged as hereinfspecified is not subject to lateral movement or misplacement, and the mold member's hold the article inexact position, there is nopractical diflicult-y insuch object asthe pin 13 not being accurately positioned when. the hard rubber article is finished. We do not wish to limitthe-invention to downward extension from the upperrmemtheme of a mere 2 article "like a'pin-as otherobjects can also be used. I

Throughv he mold members a pair of'rods 1 extend that are stationary preferably as to one mold member, and 'upon the upper member a washer 15 surrounds each rod 14,

and upon that a spiral spring 16 is placed about the rod" 1 1 and compressed by the nuts 17, which are on the threaded end of the rod 14:. Hence the tension of the spring 16 may be adjusted and thus a constantly acting influence is exerted on the mold members-to bring them together during the vulcanization.

After the unvulcanized.rubber 12 has been placed in the mold and the parts arranged as shown, the mold is subjected to heat for vulcanizing the rubber, and during such step of the process the upper mold is moved by the springs to the dotted line position in Fig. 2, after the rubber contracts from its size shown in Fig. 2 to that shown in Fig. 1. This close following up of the upper mold without any limiting means other than the rubber prevents bubbling and malformation of the hard rubber article and permits objects like the pin 13 to be securely embedded therein.

As shown in Fig. 1, We preferably combine a number of molds on a pair of rods 14c,

so that several hard rubber articles may be simultaneously Vulcanized, and one pair of springs 16 compress every pair of molds.

A vulcanizin'g mold having a plurality of mold members arranged with reference to each other to form a rubber chamber from which the rubber cannot escape during vulcanization and so that the compressing movement of said members will not be limited excepting by the rubber, 1' ds extending through all of said mold members, and springs on said rods acting against said mold members for compressing the same.

Inwitness whereof, we have hereunto affixed our signatures in the presence of the Witnesses herein named.

BENJAMIN P. REMY. FRANK I. REMY.

Witnesses:

J OHN W. Lovn'rr, G. B. SLAYMAKER. 

